DE102004022622B4 - Magnetic sensor arrangement and a method for its production - Google Patents
Magnetic sensor arrangement and a method for its production Download PDFInfo
- Publication number
- DE102004022622B4 DE102004022622B4 DE200410022622 DE102004022622A DE102004022622B4 DE 102004022622 B4 DE102004022622 B4 DE 102004022622B4 DE 200410022622 DE200410022622 DE 200410022622 DE 102004022622 A DE102004022622 A DE 102004022622A DE 102004022622 B4 DE102004022622 B4 DE 102004022622B4
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- Germany
- Prior art keywords
- magnetic
- flux
- paste
- sensor arrangement
- sensor element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000004907 flux Effects 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 2
- 238000007650 screen-printing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229920006332 epoxy adhesive Polymers 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011554 ferrofluid Substances 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/0027—Thick magnetic films
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/28—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder dispersed or suspended in a bonding agent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
- H01F41/16—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Hall/Mr Elements (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Es wird eine Magnetsensoranordnung mit mindestens einem magnetfeldempfindlichen Sensorelement (5) vorgeschlagen, dessen elektrische Eigenschaften in Abhängigkeit von einem Magnetfeld eines Arbeitsmagneten (2) veränderbar sind, das durch ein bewegtes passives Geberelement beeinflussbar ist. Es ist weiterhin ein Flussleitelement zwischen dem Sensorelement und dem Arbeitsmagneten vorhanden, wobei das Flussleitelement aus einer magnetischen Flussleitpaste (6) als Klebepaste besteht, die auch eine mechanische Verbindung des Arbeitsmagneten (2) mit dem Sensorelement (5) bewirkt.It is proposed a magnetic sensor arrangement with at least one magnetic field-sensitive sensor element (5) whose electrical properties in response to a magnetic field of a working magnet (2) are variable, which can be influenced by a moving passive encoder element. Furthermore, there is a flux-conducting element between the sensor element and the working magnet, the flux-conducting element consisting of a magnetic flux-conducting paste (6) as adhesive paste, which also effects a mechanical connection of the working magnet (2) to the sensor element (5).
Description
Stand der TechnikState of the art
Die Erfindung betrifft eine Magnetsensoranordnung, insbesondere zur Sensierung einer Bewegung oder einer Position von linear oder rotatorisch bewegten Geberelementen, nach den gattungsgemäßen Merkmalen des Hauptanspruchs.The invention relates to a magnetic sensor arrangement, in particular for sensing a movement or a position of linear or rotationally moving donor elements, according to the generic features of the main claim.
Es ist an sich bekannt, dass magnetfeldempfindliche Sensoren in vielen Bereichen Anwendung finden, bei denen eine berührungsfreie Detektierung einer Bewegung oder einer Position gewünscht ist. Beispielsweise wird bei passiven Geberelementen, die aus einem weichmagnetischen Material bestehen, das magnetische Feld durch einen Arbeitsmagneten erzeugt, der fest mit dem Sensorelement verbunden ist. Das Sensorelement misst die Beeinflussung des Magnetfeldes des Arbeitsmagneten, die durch die Bewegung der Geberelemente hervorgerufen wird.It is well-known that magnetic-field-sensitive sensors are used in many fields in which a non-contact detection of a movement or a position is desired. For example, in passive donor elements, which consist of a soft magnetic material, the magnetic field generated by a working magnet, which is firmly connected to the sensor element. The sensor element measures the influence of the magnetic field of the working magnet, which is caused by the movement of the encoder elements.
Zur Verbesserung dieses Arbeitsfeldes im Magnetkreis kommen bei vielen Magnetsensoranordnungen Flussleitstücke oder Flussleitscheiben zum Einsatz. Diese bestehen aus festen, weichmagnetischen Materialien und werden in vielerlei Formen und Größen verwendet. Auf diese Flussleitstücke oder Flussleitscheiben werden die jeweils eingesetzten sensitiven Elemente, z. B. spezielle integrierte Schaltkreise, als magnetfeldempfindliche Sensoren positioniert.In order to improve this working field in the magnetic circuit, flux guides or flux guide disks are used in many magnetic sensor arrangements. These are made of solid, soft magnetic materials and are used in many shapes and sizes. On these flux guides or flow guide the particular sensitive elements used, for. B. special integrated circuits, positioned as magnetic field sensitive sensors.
Es ist aus der
Ferner ist auch aus der
Ferner ist noch der
Aus der
Bei der Herstellung solcher Magnetsensoranordnungen mit separaten Flussleitstücken kann es eventuell nachteilig sein, dass eine große Anzahl von Prozessschritten zum Fügen der Anordnung erforderlich ist. Weiterhin stellt die begrenzte Verfügbarkeit von Blechen beliebiger Abmaße als Flussleitstücke oder -scheiben und die schwierige Bearbeitbarkeit der zumeist dünnen Werkstoffe, z. B. das Verbiegen beim Stanzvorgang und die schwierige Positionierung bzw. Fixierung der sensitiven Elemente relativ zum Magneten, ein Problem dar.In making such magnetic sensor assemblies with separate flux guides, it may be disadvantageous that a large number of process steps are required to join the assembly. Furthermore, the limited availability of sheets of any size than flux guides or discs and the difficult machinability of mostly thin materials, eg. B. the bending during the punching process and the difficult positioning or fixation of the sensitive elements relative to the magnet, a problem.
An sich sind aus der
Vorteile der ErfindungAdvantages of the invention
Eine Magnetsensoranordnung der eingangs angegebenen Art weist mindestens ein magnetfeldempfindliches Sensorelement auf, dessen elektrische Eigenschaften in Abhängigkeit von einem Magnetfeld eines Arbeitsmagneten veränderbar sind. Das Arbeitsmagnetfeld ist durch ein bewegtes passives Geberelement beeinflussbar und es wird mit einem Flussleitelement, das erfindungsgemäß aus einer magnetischen Flussleitpaste besteht, das Arbeitsmagnetfeld unterstützt und gleichzeitig zwischen dem Sensorelement und dem Arbeitsmagneten in vorteilhafter Weise zusätzlich eine mechanische Verbindung hergestellt.A magnetic sensor arrangement of the type specified has at least one magnetic field-sensitive sensor element whose electrical properties are variable as a function of a magnetic field of a working magnet. The working magnetic field can be influenced by a moving passive transmitter element, and the working magnetic field is supported by a flux conducting element, which consists of a magnetic flux conducting paste according to the invention, and at the same time, in addition, a mechanical connection is produced between the sensor element and the working magnet.
Bevorzugt ist hierbei die Flussleitpaste aus einer Klebepaste gebildet, die mit magnetisch leitenden Partikeln gefüllt ist. Die Klebepaste als Basis kann beispielsweise aus einer Epoxidklebemischung gebildet sein und die magnetisch leitenden Partikel in der Flussleitpaste sind ein Material mit weichmagnetischen Eigenschaften, zum Beispiel ein MnZnFe-Pulver.In this case, the flux-conducting paste is preferably formed from an adhesive paste which is filled with magnetically conductive particles. The adhesive paste as the base may be formed of, for example, an epoxy adhesive mixture, and the magnetic conductive particles in the flux conductive paste are a material having soft magnetic properties, for example, a MnZnFe powder.
Für sich gesehen sind magnetische Lacke und Emulsionen bereits bei Magnetbändern, Magnetkarten und sogenannten magnetischen Encodern bekannt. Sie bestehen hier aus hartmagnetischen Pulvern, die in eine Klebstoffmatrix eingebettet sind. Die Klebeeigenschaften beschränken sich hier jedoch auf die Adhäsion des Films auf seinen Träger und besitzen keine weitergehenden Funktionen. Sie erfüllen keine Zusatzbedingungen, wie z. B. Kopplung als Klebstoff zwischen zwei Elementen, mit Berücksichtigung von thermischen Ausdehnungskoeffizienten, wie es beim Kleben von integrierten Schaltungen auf einen Träger unbedingt erforderlich ist, wenn mechanische Spannungen vermieden werden müssen.By itself, magnetic paints and emulsions are already known in magnetic tapes, magnetic cards and so-called magnetic encoders. They consist of hard magnetic powders embedded in an adhesive matrix. However, the adhesive properties here are limited to the adhesion of the film to its support and have no other functions. They do not fulfill additional conditions, such as B. Coupling as an adhesive between two elements, taking into account thermal expansion coefficients, as is absolutely necessary in the bonding of integrated circuits on a support when mechanical stresses must be avoided.
Gemäß der Erfindung wird in vorteilhafter Weise die Kombination der magnetischen Flussleitung und der Klebefunktion in einer Schicht verwirklicht. Die dazu verwendete magnetische Flussleitpaste dient zum Verbinden eines verpackten IC's als integrierter Schaltung beziehungsweise eines unverpackten Siliziumchips als Sensorelement mit einem Arbeitsmagneten und gleichzeitig zur Homogenisierung des magnetischen Feldes dieses Arbeitsmagneten im Sensorelement unter Berücksichtigung der beispielsweise im Bereich der Kraftfahrzeugtechnik benötigten Parameter wie z. B. hohe Temperaturstabilität und angepasster thermischer Ausdehnungskoeffizient.According to the invention, advantageously, the combination of the magnetic flux line and the adhesive function in one layer is realized. The magnetic flux paste used for connecting a packaged IC as an integrated circuit or an unpacked silicon chip as a sensor element with a working magnet and at the same time for homogenizing the magnetic field of this working magnet in the sensor element taking into account, for example, in the field of automotive technology required parameters such. B. high temperature stability and adjusted thermal expansion coefficient.
Bei der Erfindung wird eine Klebepaste mit den magnetisch leitenden Partikeln gefüllt und somit wird in besonders vorteilhafter Weise die Kombination von Klebe- und Flussleiteigenschaften realisiert. Dabei lassen sich durch Siebdruck oder Dispensen annähernd beliebige Formen und Dicken der magnetischen Flussleitpaste herstellen. Des Weiteren lässt sich auch auf einfache Weise die Fertigungstiefe bei dem Herstellungsverfahren für die Magnetsensoranordnung reduzieren, da die Zahl der Prozessschritte durch die Kombination von Klebe- und Flussleitfunktion reduziert wird.In the invention, an adhesive paste is filled with the magnetically conductive particles, and thus the combination of adhesive and flow-guiding properties is realized in a particularly advantageous manner. By screen printing or dispensing, almost any shape and thickness of magnetic flux paste can be produced. Furthermore, the vertical range of manufacture in the manufacturing process for the magnetic sensor arrangement can also be reduced in a simple manner, since the number of process steps is reduced by the combination of adhesive and flux-conducting function.
Durch die Einsparung eines Elements lässt sich weiterhin die Positioniergenauigkeit des IC's als Sensorelement deutlich verbessern.By saving an element can continue to improve the positioning accuracy of the IC as a sensor element significantly.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung erläutert. Es zeigen:An embodiment of the invention will be explained with reference to the drawing. Show it:
Beschreibung der AusführungsbeispieleDescription of the embodiments
In
In
Die Flussleitpaste
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200410022622 DE102004022622B4 (en) | 2004-05-07 | 2004-05-07 | Magnetic sensor arrangement and a method for its production |
| FR0504546A FR2870001B1 (en) | 2004-05-07 | 2005-05-04 | MAGNETIC DETECTOR ARRANGEMENT AND METHOD FOR MANUFACTURING THE SAME |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200410022622 DE102004022622B4 (en) | 2004-05-07 | 2004-05-07 | Magnetic sensor arrangement and a method for its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102004022622A1 DE102004022622A1 (en) | 2005-12-08 |
| DE102004022622B4 true DE102004022622B4 (en) | 2013-09-12 |
Family
ID=35169574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE200410022622 Expired - Fee Related DE102004022622B4 (en) | 2004-05-07 | 2004-05-07 | Magnetic sensor arrangement and a method for its production |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102004022622B4 (en) |
| FR (1) | FR2870001B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1763190C3 (en) * | 1968-04-19 | 1976-11-11 | Reuter Technologie GmbH, 2844 Lemförde | Electromechanical or mechanoelectrical measuring transducer |
| EP0489111B1 (en) * | 1989-08-21 | 1994-05-18 | Siemens Aktiengesellschaft | Flux concentrator for magnetic sensors |
| US5828940A (en) * | 1993-11-10 | 1998-10-27 | Learflux Inc. | Formable composite magnetic flux concentrator and method of making the concentrator |
| DE19753775A1 (en) * | 1997-12-04 | 1999-06-10 | Bosch Gmbh Robert | Measurement device for contactless detection of angle of rotation |
| WO2003041095A1 (en) * | 2001-11-05 | 2003-05-15 | Universidade Federal De Minas Gerais - Ufmg | Process of composites preparation between particulate materials and cyclodextrins and/or their derivatives products thereof |
| DE10233132A1 (en) * | 2002-07-20 | 2004-02-12 | Hella Kg Hueck & Co. | Rotor or coupling element for an inductive sensor for angular velocity or position measurement has a short circuit conductor made from print-deposited conducting paste |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4859941A (en) * | 1987-03-18 | 1989-08-22 | Sprague Electric Company | Proximity selectro with integral magnet, pole-piece plate and pair of magnetic transducers |
| DE842392T1 (en) * | 1995-08-02 | 1999-01-07 | Durakool Inc., Elkhart, Ind. | GEAR MOTOR SENSOR WITH IMPROVED STABILITY AND RESOLUTION |
-
2004
- 2004-05-07 DE DE200410022622 patent/DE102004022622B4/en not_active Expired - Fee Related
-
2005
- 2005-05-04 FR FR0504546A patent/FR2870001B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1763190C3 (en) * | 1968-04-19 | 1976-11-11 | Reuter Technologie GmbH, 2844 Lemförde | Electromechanical or mechanoelectrical measuring transducer |
| EP0489111B1 (en) * | 1989-08-21 | 1994-05-18 | Siemens Aktiengesellschaft | Flux concentrator for magnetic sensors |
| US5828940A (en) * | 1993-11-10 | 1998-10-27 | Learflux Inc. | Formable composite magnetic flux concentrator and method of making the concentrator |
| DE19753775A1 (en) * | 1997-12-04 | 1999-06-10 | Bosch Gmbh Robert | Measurement device for contactless detection of angle of rotation |
| WO2003041095A1 (en) * | 2001-11-05 | 2003-05-15 | Universidade Federal De Minas Gerais - Ufmg | Process of composites preparation between particulate materials and cyclodextrins and/or their derivatives products thereof |
| DE10233132A1 (en) * | 2002-07-20 | 2004-02-12 | Hella Kg Hueck & Co. | Rotor or coupling element for an inductive sensor for angular velocity or position measurement has a short circuit conductor made from print-deposited conducting paste |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004022622A1 (en) | 2005-12-08 |
| FR2870001A1 (en) | 2005-11-11 |
| FR2870001B1 (en) | 2011-03-04 |
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